An air conditioning system for a driver's seat may include an eva-core and a blower; ducts extended to supply cold air blown by the blower to respective parts of a driver's seat; a thermoelectric element cooperatively controlled with an air conditioner of a vehicle, in which coolant water passes through a heat absorbing surface, so that the coolant water cooled by heat exchange is supplied to the driver's seat through a duct after air supplied by the blower is cooled in a heat exchange unit, and a heat emitting surface is in contact with a radiator to emit heat and generate cold air; and a distributor configured to selectively supply the cold air generated by the thermoelectric element to the respective parts of the driver's seat through the ducts.